Corrugation-forming die for metal plates



April 21, 1925..

W. M. CONNERY CORRUGATION FORMING DIE FOR METAL PLATES Original FiledDec. 21, 1921 2 Sheets-Sheet l Il lmlllHllllllllllllllllllllll 4 April21, 1925. v

W. M. CONNERY conmm'rron FORMING DIE FOR METAL PLATES Origifial FiledDec. 21, 1921 "2 Sheets-Sheet 2 v 3 vwentoa I W542 17!. 652272 5 ofproviding means for stiffening thick steel plates against pressure ofany kind. In fact the desire is to provide a strong stiffener and at thesame time maintain a uniform section throughout the length of the plate,and one which will uniformly expand and contract.

It is well known that if the sloping or other shaped walls of thecorrugation or indenture are fluted, the fluted portions would detractfro-m the value of the corrugation as a stiffener. 'Furthermore aspreviously stated the metal used averages substantially {t -of an inchin thickness, which is entirely too stiff or thick to be fluted withinthe confines of the relatively small indenture, which is designed to bemade by the presentform of die-s or forming machines. In fact thecomplete indenture or corrugation is the resultant of three separate anddistinct bends arrived at by one stroke of the forming machine. The(lies in the present case are so proportioned that there is no drawingaffect such as is the case in the ordinary commercially known corrugatedplate. In forming the corrugation or indenture, the central bend is madeat the same time the projection or center die enters the cavity of theother die, whereas the other two bends are made simultaneously, duringthe last portion of the downward stroke of one of the dies. It has beenfound impossible with the strongest bending or forming machine to draw a1 K metal plate over and into the female die in a manner similar to thecor- .rugating of relatively thin sheet metal plates, which as beforestated are commercially known as corrugated sheets.

It is well to remember that there are three separate bending processesinvolved in making each indenture, and it will be noted that all ofthese bends are caused to be formed upon one stroke of one of the dies.

It is also known that the slopingor other shaped sides of the formingfaces of the indenture and projection of the opposed dies approach oneanother as close 'as is practicable. and during the approach of thesewalls the corrugation or indenture is formed in a relatively thick Uheetmetal plate. with sloping or other shaped walls. which are perfectlystraight. and due to the deformed faces of the in'denture and projectionon the opposing faces of the dies, con'ipensation is made for thevarying thicknesses of the sheet -1i'1etalplates. In fact the varyingthicknesses of the plate are allowed to'enter the deformities orirregular walls of the indenture and the projection on the dies, inorder to prevent jamming or breaking of the form- 111 12 machine.

The indentures or corrugations to be that have heretofore been rivetedto the plates, and it is also important to note that the indenture orcorrugation represents the angle or beam, which permits, as nearly aspossible. to oppose the direction of stress and in a line with thedirection of stress. in order to not only reinforce the plate but alsoto permit the plate to uniforn'ily expand and contract.

The plates which are to he corrugated or provided with indentures of thepresent character, by the use of the forming dies herein shown. are usedin the construction of bins or tanks. or fines or flue sections.conduits or conduit sections. or other ducts. and the various plates forsuch work may average six feet by ten feet. n'iore or less. withstiffeners or corrugations disposed to extend with the length of theplates.

As previously stated all relatively thick sheet metal plates do not varyalike. variation in thickness alone is greater than the total thicknessof any commercial plates which are corrugated. For this reason it is thepurpose of the present invention to provide forming dies, withinterengaging projections or indentures with deformed faces. in order totake care of the varying thicknesses of the plates. It is wellestablished that 'dies and the metal to be formed cannot come togetherin one solid pack, unless plates are aliisolutely true and of a uniformthickness throughout their area. which never the case.

The deformed or fluted dies permit. without altering the adjustn'ient.the forming of the indentures or corrugations in the plates. thoughvarying in thickness. the main purpose of such forming dies is to avoidbreaking of the machine or jamming of the parts. i'\dditionally it isthe aim to avoid the producing of a fluted product. and this is done byusing dies. wherein their interengag ng projection or depression havedeformed or fluted walls.

The present form of die may be any length whatever. and in someinstances it may be found most convenient to'use a number of short dies.and in other cases it may be possible to use one long die up to thecapacity of the forming machine.

It is most important to note that the deformed walls of the projectionand depression provide a suitable clearance. to compensate for thevarying thicknesses in the plates. thereby llll'lltlllQ any possibilityof jamming the operative parts of the forming machine. and alsopreventing breaking of the machine.

' It is to be understood that the particulars herein given are in no waylimitative and that while still keeping within the scope of theinvention. any desired modifications of detail and desired proportionsmay be made in the apparatus according to circumstances.

The

The invention comprises further features llll llll) lle i Figu i'efh aSectional Figuife 6 f male fend} fem ale dies, shive ing aflihbdifiedfolfmingdies,constructedinaecerdaneeqvith t plat offthewalle of theprojeetien 6 andihe fie pressienbf 'the" female die, and are disposedpurpose of receiving or compensating for the varyilig thickneesesinthefsheet metal plates, l which "are pressed between the 'dies. In feet(the alternate depressions mayQbegrienned aeY siofn *ofthe female diemay varvin ebnteulfu 1 in Figureef1 te8 inclusive and Fig: I ure5fmayeonverge 1nwardlv and upwardly;

"whieh jreieurvedin cross eeetion In fact epm jensate for the} vayingfthieknessejs of I f 5 the plate whichgirefdesignediobe pressed m intothe curved surfaces 10. The cavity 5 in Figure 8 is not engaged by theplate to be formed with a corrugation. However the plate is drawn overthe curved corners 8 and furthermore when forming the plate with acorrugation by means of the dies in Figure 8, the male die moves to aposition shown in Figure 8, so that the portion of the plate on oppositesides of the corrugation will not become distorted out of alignn'ient,and so that the apex of the corrugation will not contact with the bottomof the cavity 5.

In Figure 9 the edges or supports 7 and S are simply reversed to theedges or supports 7 and 8 in the other figures. It will be noted thatthe adjacent faces of the male and female dies, that is to say uponopposite sides of the dies, as at 8 and 11 are so formed as to permitthe plate metal to creep from opposite sides of the die, as the male dieenters the female die. Furthermore the two dies do not come together anycloser than sufficient to permit the plate metal to engage between thedies. In other words the male die is limited in its movement to acertain position. However the inclined faces 8, as well as the parts 8in Figure 9, together with the portions or parts 11, and 7 in Figure 9act to hold or dispose the metal on opposite sides of the corrugation indirect alignment, and on a horizontal plane, and will also maintain themetal horizontally. lVhen the corrugation begins to form due to the maledie bearing upon the metal and acting to force it into the female die,the metal begins to bend over the opposite corners of the depression orindentation of the female die, and obviously the metal will creep fromopposite sides of the die, whereas the dies heretofore used the metal isonly free to creep from one side only. The terms general level, generalplane or shape define those parts of the corrugation forming means,which contact with the metal, in other words those parts of thecorrugation forming means, prior to constructing the depressions, whichare below the general plane of the corrugation forming means.

The invention having been set forth, what is claimed is 1. A pair ofcorrugation forming dies havng their adjacent cooperative faces providedwith interengaging corrugation forming means, the corrugation formingmeans of one of the dies being cut away to receivethe varyingthicknesses of plate metal during the formation of a corrugationtherein.

2. A pair of corrugation forming dies provided with male and femalecorrugation forming means, the corrugation forming means of each diehaving means formed below the general level of the surface of saidforming means to receive the varying thicknesses in plate metal duringthe formation of a corrugation,

3. A pair of corrugation forming dies provided with male and femalecorrugation forming means, the corrugation forming means of each dieprovided with depressions and protuberances, the depressions adapted toreceive the varying thicknesses in plate metal during the formation of acorruga tion, one of said dies having means l iearing against portionsof the plate metal upon opposite sides of the corrugation to hold theopposite portions of the plate in horizontal alignment during theformation of the corrugation.

at. A pair of dies, the adjacent faces ther of provided with male andfemale corrugation forming means, said corrugation forming means havingexcessive plate metal. receiving means extending longitudinally of theforming means, said excessive plate metal receiving means beingconstructed below the general contour of the forming means and arrangedin staggered relation, for the reception of the varying thicknesses inplate metal in which the corrugation is to be formed.

5. A pair of dies, the adjacent faces thereof provided with male andfemale corrugation forming means, said corrugation forming means havingexcessive metal receiving means extending longitudinally of the formingmeans, said excessive metal receiving means being constructed below thegeneral plane of the forming means and arranged in staggered relation,for the reception of the varying thicknesses in a sheet metal plate inwhich the corrugation is to be formed, the ends of the staggeredexcessive metal receiving means overlying each other to insure thereception of the excessive metal of a plate varying in thicknessthroughout its area.

6. A pair of dies, the adjacent faces thereof provided with male andfemale corrugation forming means, said corrugation forming means havingexcessive metal receiving means extending longitudinally of the formingmeans, said excessive metal receiving means being constructed below thegeneral plane of the forming means and arranged in staggered relation,for the reception of the varying thicknesses in a sheet metal plate inwhich the corrugation is to be formed, the ends of the staggeredexcessive metal receiving means overlying each other to insure thereception of the excessive metal of a plate varying in thicknessthroughout its area, one of said dies having means bearing upon oppositesides of the corrugation, to hold said opposite portions of the plate inpositions perpemlicular to the side faces of the die during theformation of the corrugation.

7. In a pair of dies, the opposing cooperative faces of said dies havingmale and female corrugation forming means, the opposed surfaces of saidcorugation forming 1 to hold saijdgpdftiona in; positionsperpenxtendingflogigifdfidinally ofits-formingface,

bends jdiiring the forcing bf thd plaie' metal ling face @nd,provided;with ineajn I :upqr'l theplatirwtgilaim point substantially anybewemh Ps Where the 131m;

cavity? i f rq the m-re met l n send dies 1 holdkthenoppds ite sides oftheplafte metal w eni-argpmnf pf 0 permit the ccepti'on it-extendinglongitudinal I H face; 'over th opPbSitei; edges O whichwpltte fmetalfben cl s duringytheffbncin Of th plaiifu ing" 11119011 {oppositesidjes pf theuqorruigatib n,

0i disf: dne having cavity tlig pdvityglthereby forcingTthe plzit metalfijx cbhstructiongnd arrahgemenfif 0f the Oppos throughout the areadfthe'p1atemeta1, one

pd ite sids ofthebortugationgto be formed 14. A inethod foi'forminglcdi'rfigathn a rjglatiVely thickplate metaLLcO-nsistmg inpressing agcorrugatiom irifthe plate nigtal; 1n compensatmg for varyl ngthicknesses at plate metal, in ma ir itztihingportiofis of th plate metal q'onoppositelsidesaof the; de-jfl S=11 ifO i gmea sh giilxcessiYeetal) recg 17mg 5 .epresslons and protuberances e'x tending flongtudlnallyof szud surfacsJtO h1g5 as to "lpermitjjthel metal soiciegpkfmm either; (if 1116 sideso f the dies male and femalecorrugation forming means, said adjacent faces upon opposite sidesiofsaid corrugation forming means being such as to permit the plate metalto 5 creep from thesides of the dies, and also to cent faces of whichhaving male and female corrugation forming means, the surfaces of saidforming means having means constructed below the general level of thesurfaces for thereception of the inequalities in I l5 the plate metalwhen one die is limited in its m'ovement'toward. the other die.

19.- A pair of dies, the cooperative adjacent faces of which having maleand female corrugationforming means, the surfaces of said forming meanshaving means constructed below the general level of-the surfaces forthereception of the inequalities in the plate metal, the adjacent faces ofthe dies beyond the opposite remote portions of the forming means beingsuch as to permit the plate metal to creep from both sides of the diesas the corrugation is formed.

20. A method for forming a corrugation in relatively thick plate metal,which is ca pable of feeding from opposite directions toward thecorrugations, which first consists in pressing a corrugation in theplate metal, maintaining the plate metal beyond and upon opposite sidesof the corrugation in aligning planes perpendicular to the sides .1

of a corrugation fori'ning means, in compensating for the varyinginequalities at different points throughout the area oif the platemetal.

In witness whereof, in the presence of two witnesses, the inventorssignature is here unto aflixed.

l VILLIAM M. CON N ERY. Witnesses EDGAR C. ANoorr, ALBERT W. STEWART.

